Recording mechanism.



J. F. OCONNOR.

RECORDING MECHANISM.

APPLICATION FILED NOV. 6, 1915.

1,262,083. Patented Apr. 9, 1918.

5 SHEETS-SHEET 1.

INVENTOR. (EMF/0610111102 BYQ HSK. m; gDATTiTv cj WITNESS J. F. OCONNOR.

RECORDING MECHANISM.

APPLICATION FILED NOV 6. 1915.

Fig 2 Patented Apr. 9, 1918.

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RECORDING MECHANISM.

APPLICATION FILED NOV. 6. 1915.

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J. F. OCONNOR.

RECORDING MECHANISM.

APPLICATION FILED NOV. 6. 1915.

1,262,083. Patented Apr. 9,1918.

5 SHEETS-SHEET 4.

IN VE N TOR. JZ'MJF' 71/7201 BYQAK q SK L3 \Qm ATTORNEY WITNESS J. F. OCONNOR.

RECORDING MECHANISM.

1 APPLICATION FILED NOV. 6,1915. 1,262,083. Patented Apr. 9, 1918.

5 SHQETS-SHEET 5.

INVENTOR.

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WITNESS I @A TTORNEY UNITED STATES PATENT OFFICE.

JOHN F. OCONNOR, OF CHICAGO, ILLINOIS, ASSIGNOB T0 WILLIAM H. MINER, OF CHAZY, NEW YORK.

RECORDING MECHANISM.

Specification of Letters Patent.

Patented Apr. 9, 1918.

Application filed November 6, 1915. Serial No. 59,917.

To all whom it may concern Be it known that 1, JOHN F. OCoNNon, a citizen of the United States, residing at Chicago, in the county of Cook and btate of Illinois, have invented a certain new and useful Improvement in Recording Mechanism, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of thi specification.

This invention relates to improvements in recording mechanism.

An object of the invention is to provide a recording mechanism more particularly adapted for recording the action of draft gear while being tested in a bulldozer.

The invention furthermore consists in the improvements of the parts and devices and in the novel combinations of the parts and devices herein shown, described and made the subject of claim.

In the drawing forming a part of the specification, Figure 1 is a side elevation of a bulldozer showing a friction draft gear in place to be tested and illustrating my improvements attached to the bulldozer. Fig. 2 is a side elevation of the recording mechanism proper, upon an enlarged scale. Figs. 3, 4, 5, 6, 7 and 8 are sectional views taken respectively on the lines 33, 4-4, 5-5, 66, 7-7, and 88 of Fig. 2. Fig. 9 is a vertical, ectional View taken on the line 99 of Fig. 1. And Fig. 10 is a reproduction of a record made with my recording mechanism.

In said drawing, 11 denotes the bed plate of the bulldozer, 12 the slidable cross-head, and 13 the anvil or striking plate carried by a heavy piston 14 which is backed by water confined within a cylinder, as will be understood. The water is supplied to the said cylinder from a city main through the pipe 15, check valve 16, pipe 17, T 18 and nipple 19. From the other side of the T 18 extends a pipe 20 which communicates wlth pressure gage 21, a suitable globe valve 22 being interposed in the pipe whereby the pressure gage may be thrown out of commission. Communicating with the check valve 16, and on the side between the check valve proper and the pipe 17, is a pressure cylinder 23 closed at its upper end as by a plate 24 bolted to a flanged collar 25 threaded on the cylinder 23. Commumcating with the interior of the pressure cylinder 23 is an exhaust pipe 26 normally closed by a globe valve 27. The utility of the pressure cylinder 23 will be hereinafter described. A represents a friction gear of a well known type showing the manner in which the same is placed when its action is to be recorded, as hereinafter described, the gear A resting upon a block or other suitable device 28 to properly aline it with the anvil 13 and the striking block 29 carried by the cross-head 12. The striking plate 29 is adjustable vertically in order to bring it in proper alinement with the center of the gear by a bar 30 linked with a lever 31 pivoted on brackets 32, the right hand end of the lever 31, as viewed in Fig. 1, being counterbalanced or otherwise retained in suitable position. The bulldozer, as hereinafter described, is or may be of any well known or desired type and, per 86, does not form any part of my invention.

The lGCOrding mechanism, as shown, comprises the following arrangement: Mounted on a heavy plate B which is secured to the bulldozer as by bolts C is an upper guide 33 and a lower guide 34 for a horizontally slidable plate 35, said plate 35 being arranged to carry the paper or other recording medium 36, the sheet of paper 36 being held in proper position on the sliding plate 35 by horizontally elongated, spring controlled, upper and lower pivoted clips 37 and 38. (See Figs. 2 and 4). At its lower end, the sliding plate 35 is provided with a rack 39. l/Vith this rack meshes a gear 40 having a hub 41 which is rotatably mounted on a stud shaft 42, the latter being threaded at its inner end in said plate B, its outer end being supported in a bracket 43. Said hub 41 has also formed integrally therewith another smaller gear or pinion 44, the latter being preferably half the diameter of the gear 40. The gear 44 is in mesh with and operated by a horizontally slidable rack bar 45 which is guided in a bracket 56 also secured to the heavy plate B. At the left hand end as viewed in Fig. 2, the rack bar 45 is provided with a right angled depending extension 46 which is secured to a horizontally slidable bar 57, the latter being guided between said plate B and the side of the bulldozer, see Figs. 4 and 5 where the plate B is shown as recessed at 58 to accommodate the said bar 57. As shown in Fig. 1 the bar 57 is extended to the right of the plate B and is supported in two brackets 59-59. At its extreme right hand end the bar 57 is provided with a pivoted piece 60 which, when in alinement with the bar 57 is adapted to be engaged and operated by a depending arm 61 carried by the cross-head 12. \Vhenever it is not desired to actuate the bar 57, the end piece 60 is swung back so as to be clear of the arm 61. At its left hand end, the sliding bar 57 has secured thereto a piston 62 which slides within a casing 63 b0 ted to the side of the bulldozer, said piston 62 being engaged by a spring 6st confined within said casing 63. It is obvious that upon the return of the cross-head 12 after the bar 57 has been actuated the latter will be returned to normal by the spring 6%, and in fact will travel with the cross-head without any lost motion.

From the preceding description, it will be seen that upon movement of the cross-head 12, the plate 35 which carries the recording paper 36 is moved in unison therewith but at twice the rate through the medium of the rack bar 55, gear 41, gear 40, and rack 39. The parts are so adjusted that the depending arm 61 on the cross-head will engage the pivoted piece 60 slightly before the engagement of the striking plate 29 with the wedge 65 of the friction gear A.

Between the check valve 16 and the pipe 17 is inserted a T 66 from which extends a pipe 67, the latter having a T 68 at the bottom thereof one branch of which is closed by a cock 69 and from the other branch of which extends a pipe 70 threaded into an ell 71, the latter being threaded in a casting 72 provided with a cylinder 73 on its interior. The casting 72 is preferably attached to the plate B by a threaded nipple 74, the latter communicating with the cylinder 73 to act as a drain, as hereinafter described. The casting 72 is provided with a flange 75 to which is secured a plurality of vertically extending bolts 76, the latter at their upper ends being secured to and firmly supporting a plate 77. The plate 77 is centrally recessed as indicated at 78, and slidably mounted within said recess is a flanged cap 79 threaded on a hollow sleeve 80 which is provided at its lower end with an outstanding flange 81, the flange 81 acting as a follower for the lower end of a heavy spring 82, the upper end of said spring 82 hearing against a follower 83 which engages the underside of said plate 7 7. Within the sleeve 80 and hearing at its upper end against the cap piece 79 is a plunger 81 which has secured to its bottom end a piston 85 which slides with a tight fit within the cylinder 73. At its upper end the plunger 84: is provided with a rod-like member 86 which passes through the cap piece 79 and on which is secured a right angled extension 87 of a vertically arranged rack bar 88. The rack bar 88 engages with a pinion 89 cast integrally with a hub 90 rotatably mounted on said stud shaft +12. Also cast integrally with said hub 90 is a larger gear wheel 91, preferably six times the diameter of said pinion or gear 89. The gear 91 meshes with and operates a vertically slidable rack bar 92 which is guided by brackets 93 and 56. At its upper end, the rack bar 92 carries a pencil arrangement, hereinafter described. At its lower end the rack bar 92 has adepend ing link 95 to which is attached one end of a spring 96, the opposite end of said spring being secured to any suitable stationary bracket or other device 97 whereby the rack bar 92 will always be pulled downwardly after each actuation.

The pencil arrangement consists of a horizontally slotted or bifurcated member 98 which is secured to the top of the rack bar 92 as by a bolt 99. Mounted within the slotted member 98 and pivoted on said bolt 99, is an arm 100, the outer end of which is bifurcated as indicated at 101 and 102 in Fig. 2 and between which is adapted to be held a pencil 103, a tightening screw 104 being provided to clamp the bifurcations 101 and 102 on the pencil. The arm carries a pin 105 which extends into a slot 106 arranged transversely of the upper web of the member 98. The latter is provided with an adjustable thumb screw 107 having an eccentric flange 108 thereon, the said screw 107 being disposed adjacent the slot 106, whereby the amount to which the pin 1.05 may enter the slot 106 is regulated by adjusting the thumb screw 107. The pencil carrying arm 100 is yieldingly impelled toward the record sheet by means of a spring 109 which has one end thereof attached to a screw 110 which is secured to the arm 100, the opposite end of said spring 109 bein attached to a pin 111 mounted on said meniber 98.

The operation is as follows: As before described, the member 35 will be actuated upon movement of the cross head 12 through the rack bar 15, gear 1%, gear 10 and rack 39 and inasmuch as the diameter of the gear 10 is twice that of the gear 44, the member will move twice as fast as the cross head. Also, upon compression of the gear, the pencil will be actuated through the instrumentalities of the plunger 84:, rack 88, gear 89, gear 91 and rack 92 by which the pencil is carried. When pressure is applied to the gear, the same is transmitted through the plunger 14 to the water within the cylinder of the bulldozer. The pressure created will, of course, be transmitted through the pipe 20 to the gage 21 and may be observed from the latter. Simultaneously, the pressure will be transmitted through the water in the pipes 17, 67, 70, and 71 to the interior of the cylinder 73 and accordingly the piston 85 and plunger 84 will be elevated against the action of the heavy spring 82. The upward movement of said piston and plunger Will, of course, correspond to the pressure created, and as a consequence thereof the movement of the pencil 103 will also correspond to the pressure but the movement of the pencil Will be six times that of the piston 85 and plunger 84. The result Will be that a record will be made substantially as inclicated in Fig. 10 on the paper 3". On the record thereon, the portion of the line between the points (Z and 6 indicates the movement of the cross-head and member 35 prior to engagement of the striking plate 29 with the gear being tested. The line 6, ,1, g, indicates the increase of pressure during the positive actuation or compression of the gear, the point 9 representing the maximum pressure or resistance ofiered by the gear, which is obtained. T he line 9, h, 6, indicates the release or return line when the crosshead 12 is returned, as will be understood. The vertical dimensions on the record card are in the ratio of six to one of the pressure created and horizontally the dimensions are two to one of the actual movement of the gear parts.

Both the springs 64 and 82 are made comparatively heavy in order to prevent any lag of the parts during the release movement. Although the Water employed is substantially incompressible, as is Well known, nevertheless, it is exceedingly difficult to fit all the moving parts so as to avoid any pos sibility of leakage and While the amount of leakage may be extremelv small, it is neces sary to compensate for the same so as to prevent any variation in the record line during the release of the gear and hence, I have provided the chamber 23 which is so filled that a small volume of air is confined therewithin under the extremely great pressure and any slight change in the volume of the Water contained in the hydraulic arrangement, due to leakage, will be compensated for by the expansion. of said air.

Fromthe preceding description, it will be seen that I have provided an arrangement which may be readily attached to any bulldozer; the same is relatively simple in construction and arrangement of parts; it produces a record wherein the actions are multiplied so as to produce a card which may be more readily analyzed, and the arrangement in such as to minimize any possibility of lost motion, backlash, or chattering of the parts.

Although I have herein shown and described What I now consider the preferred embodiment of my invention, the same is merely illustrative and I contemplate all changes and modifications that come Within the scope of the claims appended hereto.

I claim:

1. A recording mechanism adapted to be attached to a bulldozer having a hydraulic cushion and a movable cross-head, said mechanism including a member adapted to carry a record sheet movable in one direction and actuated in accordance with the movements of the cross-head, a marker movable at right angles to the movement or" said member, means for actuating said marker by hydraulic pressure, said means being in communication with the hydraulic cushion of the bulldozer, and an elastic cushion in communication With said last named communications adapted to prevent backlash of the marker when the hydraulic pressure is r-lieved.

2. In mechanism of the character described, the combination With a bulldozer having a slidalole cross-head and a hydraulically cushioned plunger of a slidable record carrying member adapted to be actuated in accordance With the movements or" the cross-head, a marker cooperating with said member, a hydraulically actuated plunger in communication with said hydraulic cushion of the bull-dozer, means interposed between said plunger and the marker for actuating the latter, and an elastic cushion in communication with the piping to said hydraulically actuated plunger.

8. In a device of the character described, the combination With a bull-dozer having a slidable cross-head, of a recording mechanism including a slidable record sheet carrying member, and means interposed between said member and said cross-head for actuating the member in accordance With the movements of the cross-head, said means including a slidable bar having a movable member adapted to be positioned out of the path of said cross-head and thereby prevent actuation of said record sheet carrying member.

at. recording attachment adapted to be applied to a bulldozer, said attachment comprising a plate adapted to be secured to the bulldozer, a record sheet carrying member slidably mounted on said plate, a hydraulically actuated plunger carried by the plate, a marker movable transversely of said member, gearing interposed between said plunger and said marker, a rack bar adapted to be actuated from the cross-head of the bulldozer, and gearing interposed between said rack bar and said member for communicating movement to the latter.

In Witness that I claim the foregoing I have hereunto subscribed my name this 22nd day of Oct, 1915.

JOHN F. OCONNOR.

Copies of this patent may be obtained for five cents each. by addressing the Commissioner of Eatents, Washington, D. C. 

